Reaction products of dialkyl phosphorothiolothionates and acetylenic compounds



United States Patent REACTION PRODUCTS OF DIALKYL PHOSPHORO- THIOLOTHIONATES AND' ACETYLENIC COMr POUNDS No Drawing. Application November 14, 1956 Serial No. 622,023

6 Claims. (Cl. 260-461) This invention relates to new organophosphorus compounds and their method of preparation. In a specific aspect this invention relates to the reaction of dialkyl phosphorothiolothionates and acetylenic compoundsand to the resulting products.

Organophosphorus compounds have evidenced marked utility and importance in many areas. They have been employed as insecticides, fungicides, pesticides and related uses. Consequently, it is of. considerable importance to the art to have new and useful organophosphorus compounds and, moreover, to have a new process for the production of organophosphorus compounds. Therefore, it is an object of this invention to provide new and useful organophosphorus compounds, to provide new and useful methods of producing organophosphorus compounds, and to provide new compounds which are valuable as insecticides and "in' insecticidal compositions."

These and other objects will be apparent from the description and claims' which follow.

We have found that new and valuable organophosphorus compounds can be produced by the novel process which comprises reacting avdialkyl P sphorothiolothio nate with an acetylenic compound. This process may be effected advantageously byreacting a dialkyl phosphorothiolothionate containing l to 4 carbon atoms'in each alkyl group with an acetylenic compound containing 1 carbon-to-carbon triple bond. Acetylenic compounds which are suitable in the practice of this invention include propargyl alcohol, propargyl acetate, propargyl bromide, 1,4-butynediol, 1,4-dichloro 2-butyne,

. alkyl esters of propiolic acid, 2-methyl-3-butyn-2-ol, 3-

methyl-l-pentyne-3-ol, 2,5-dipheny1-3-hexyne-2,S-diol, '1- ethynylcyclohexan-l-ol, 3-phenyl-1-butyn-3-ol, bis(1-hydroxycyclohexyl)acetylene, acetylenedicarboxylic acid, and alkyl esters of acetylenedicarboxylic acid.

The following equation is illustrative of the reaction involved in our process:

ROfi fi PSH H0 GH 'CECH PS-C=CH2 no R0 CHIOH It is to be noted, in this regard, that the foregoing is offered only in illustration and is not intended to limit the invention in any way to thisrepresentation.

In the practice of this process, we prefer to react equimolar quantities of the dialkyl phosphorothiolothionate and the acetylenic compound; however, any molecular ratio of the reactants is inaccord. with the invention and will give the desired products. The operable temperature range of this reaction is from 25 to 150 C., but a preferred range is 25 to 125 C. Although inert solvents may be used, weprefer to operate without a solvent. Suitable inert solvents include the normally liquid hydrocarbons suchwas pentane,..hcptane; benzene and toluene, chlorinated hydrocarbons, ethers and esters. Suitable reaction periods for this process include reac- Patented Nov. 10, 1959 ICC , 2' tion times within the range of min. to 8 hours. Although catalysts are not required, basic catalysts such as tertiary amines can be used.

The novel compounds of our invention produced by the above-described process can be characterized by the following formula: H r

v -0 o'm, C, -+R, Ho OHo, 0H OH and Y is selected from the group consisting of --H, -CH OH, CH Cl, and

' CHzCHg and R and R are lower alkyl groups containing from 1 I 5 to 4 carbon atoms. It is to be noted that'the carbonto-carbon double bond of the compound'represented by the above formula is in the same position as the carbonto-carbon triple bond of the acetylenic reactant used to produce said compounds. I Thus, while the formulas given above are believed to be descriptive of the compounds In order to further illustrate and explain our'inv ention, the following examples are offered:

Example 1.-0,0-diethyl S- [1 (hydr0xymethyl) vinyl] phosphorothiolothionate HooHi0=OHz s1 s oo,n5 Propargyl alcohol (0.1 mole) and diethyl phosphorothiolothionate (0.1 mole) were mixed and stirred while carefully heated to 125 C. for 40 minutes. The reaction mixture was allowed to cool to 25 C. with stirring and then stripped under reduced pressure (1-2 mm.) to remove volatile impurities. The product is a transparent, amber colored oil, 11 1.5123. 1 1 Exampl 2.-O ,O-diethyl.S-(3-hydroxy-1-hydroxymethylpropertyl) phosphorothiolothionate H0cH,o=0HCH,0H

' sr s oo2n Diethyl phosphorothiolothionate (0.1 mole) and 1,4- butynediol (0.1 mole) were'mixed and stirred. There is no apparent reaction, and thebutynediol does not go into solution. The reaction mixture was heated with stirring to a temperature of C. for 1 /2 hours. Then the reaction mixture was cooled to 25 C., and stripped under reduced pressure to remove volatile impurities. The product is a transparent, light brown oil,

n 1.5253. It adds bromine readily which indicates stirred mixture of -1,4-'dichloro'-2-butyne (0.1 mole and 7 3 diethylphosphorothiolothionate (0.1 mole) at 95 C. for 1 hour.

Example 4.0,0-dimethyl S-[1(bromomethyl)vinyl]- phosphorothiolothionate BrOH C=CHg sP(s)( OH This product was prepared by heating propargyl bromide (0.1 mole) and dimethyl phosphorothiolothionate (0.1 mole) at 95 C. for 1 hour with stirring.

Example 5.0,0-diis0propyl S-[I-(acetoxymethyD- vinyl] phosphorothiolothionate CH OOOCH2C=OHz )l a)2l2 This product was prepared by heating propargyl acetate (0.1 mole) and diisopropylphosphorothiolothionate (0.1 mole) at 95 C. for 2 hours with stirring.

Example 6.0,0-diis0butyl S-(I-ethoxycarbonylvinyl)- phosphorothiolothionate OHQZCCOOCQHB SP(S)[OCH;CH(CH3)2]2 This product was prepared by heating the ethyl ester of propiolic acid (0.1 mole) and diisobutyl phosphorothiolothionate (0.1 mole) at 110 C. for 3 hours with stirring.

Example 7.0,0-a'iethyl S-[1,2-bis( 1-hydr0xycycl0- hexyl) vinyl] phosphorothiolothionate This compound was prepared by heating a stirred mixture of diethyl phosphorothiolothionate (0.1 mole), bis- (l-hydroxycyclohexyl)acetylene (0.1 mole), and triethylamine (6 drops) on the steam bath for 4 /2 hours. The product is a viscous, orange, transparent oil, n 1.5222.

Example 8.0,0-diethyl S-(Z-hydroxy-l-methylene-2- phenylpropyl)phosphorothiolothionate CH; Gil-mam,

1 SIP 2 .5):

Example 10...0,0-diethyl S-(Z-hydroxy-Z-methyl-L methylenepropyl)phosphorothiolozhionaze C =GH:

This compound was prepared by heating a stirred mixture of diethyl phosphorothiolothionate (0.1 mole) and 2-methyl-3-butyn-2-ol (0.1 mole) for 1 hour on the steam bath.

While the marked utility of organophosphorus compounds in general has been noted, the compounds of our invention have been found to be valuable when used as insecticides or in insecticidal compositions. The following is offered in illustration of this important aspect of our invention:

Tests against mites and mite eggs were carried out in the following manner. Acetone solutions containing 1% of the candidate compounds were prepared and diluted with water to give solutions containing 1000 p.p.m., p.p.m., 30 p.p.m., and 10 ppm. of the candidate compounds for testing. Two heavily infested bean leaves containing both eggs and adult two-spotted mites (T. bimaculatus) were carefully dipped in the above solutions and dried in a gentle air stream. The leaves were then placed on damp paper toweling in Petri dishes and observed after 24 hours for mortality among the adult mites. The leaves were observed again after 7 days to determine the number of eggs killed by the treatment.

It should be noted that tests using acetone-water solutions (containing none of the toxicant) kill neither mites nor mite eggs. This is the blank run referred to in the following table:

Although the invention has been described in considerable detail with particular reference to certain preferred embodiments thereof, variations and modifications can be effected within the spirit and scope of the invention as described hereinabove, and as defined in the appended claims.

We claim:

1. As a new composition of matter, 0,0-diethyl SE1- (hydroxymethyhvinyll phosphorothiolothionate having the formula:

HO QHZC;OH2V

2. As a new composition of matter, 0,0-diethyl S-(3 hydroxy 1 hydroxymethylpropenyl)phosphorothiolothionate having the formula:

HOCHaC=OHCHzOH snowman 3. A process according to claim 6 wherein propargyl alcohol is reacted with diethyl phosphorothiolothionate.

4. A process according to claim 6 wherein 1,4-butyne diol is reacted with diethyl phosphorothiolothionate.

5. As a new composition of matter, a compound having the structural formula:

P -s e= oH 3 X Y where X is selected from the group consisting of QHaQ 6 Cm and R is an alkyl group containing from 1 to 4 carbon C 4 atoms at a temperature within the range of 25 to 150 1 E "2) J) C. for a period of time within the range of 30 minutes to 0 0 a H E 8 hours and in the absence of a catalyst for the reaction. dY' ltdfr th 't' --H,5 i a i fg fg 6 cm 6 group cons mg of References Cited in the file of this patent Omen, 'UNITED STATES PATENTS 2,528,732 Augustine Nov. 7, 1950 2,565,920 Hook et al Aug. 28, 1951 01mg 2,589,326 Oberright Mar. 18, 1952 and R and R are lower alkyl groups containing from 1 2,635,552 stfl Aug, 3, 1954 to g d h h 2,744,128 Morris et a1. May 1, 1956 e process or pro ucing new organop osp orus v compounds which comprises reacting a dialkyl phosphoro- FOREIGN PATENTS thiolothionate containing from 1 to 4 carbon atoms in 15 48,123 Italy May 10, 1949 each alkyl group with a compound having the structural 478,127 Italy Mar. 2, 1950 formula XCECY, wherein X is selected from the group OTHER REFERENCES consisting of -CH OH,

CH CH CH R Reppe: Acetylene Chemistry, 1949, p. 58. Allen et al.: I. Am. Chem. Soc., 77, 28712875 (1955). 0 2. Q i Pudovic: Doklady Akad. Nauk. SS.S.R., 105, 735-737 lfi fl, 5 A (1955 cited in Chemical Abst., 50, 11230-11231 (1956). and Y is selected from the group consisting of H, CH OH, and

/CH;C1 c 0111 l OH. Cil CH,

UNITED STATES PATENT OFFICE Certificate of Correction Patent No. 2,912,450 November 10, 1959 Richard L. McConnell et al.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 3, lines 32 to 38, Example 7, the formula should appear as shown below instead of as in the patent:

smsxocmm ere-on,

Signed and sealed this 21st day of June. 1960.

Attest: KARL H. AXLINE, ROBERT C. WATSON, Attestz'ng Ofieer. Oomwm'ssz'oner of Patents. 

5. AS A NEW COMPOSITION OF MATTER, A COMPOUND HAVING THE STRUCTURAL FORMULA:
 6. THE PROCESS FOR PRODUCING NEW ORGANOPHOSPHORUS COMPOUNDS WHICH COMPRISES REACTING A DIALKYL PHOSPHOROTHIOLOTHIONATE CONTAINING FROM 1 TO 4 CARBON ATOMS IN EACH ALKYL GROUP WITH A COMPOUND HAVING THE STRUCTURAL FORMULA XC=CY, WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF -CH2OH, 